@article{ARM_2008__44_2_a6,
     author = {Kowalski, Old\v{r}ich and Sekizawa, Masami},
     title = {Invariance of $g$-natural metrics on linear frame bundles},
     journal = {Archivum mathematicum},
     pages = {139--147},
     publisher = {mathdoc},
     volume = {44},
     number = {2},
     year = {2008},
     mrnumber = {2432851},
     zbl = {1212.53042},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2008__44_2_a6/}
}